"I wasn't expecting that..." {Matthew/ APH Canada x Reader}

This story takes place in modern time.
A little info on the reader's character...
Her room is galaxy themed. She has a vinyl collection {I've always wanted a collection of those ;-;}.
She lives in the United States {Doesn't have to be USA...} and has family up in Vancouver, Canada. So when she usually visits... she goes sight seeing. Present day.. she goes to visit her late grandmothers grave along with her brother. When she goes to a nearby park to just go for a walk, she discovers a boy who called himself 'Matthew.' He said numerous times that he was unnoticed by many yet he was easily spotted by you.
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Thought I'd give the Reader's character a name {This story is in 3rd person. I may do 1st person occasionally}. So here you go: Her name shall be Arabella. {No nicknames, sorry. I really love that name though..}
This desc. is a little simpler than what I had it before. I accidentally deleted the desc. so I had to retype it fast before I forgot or procrastinated. If you read this, thank you so much! You have no idea how happy it makes me when I see people have read this.
Also, the title was based off of the song, 'Wasn't Expecting That' by Jamie Lawson